[imp] Groupware 5.1.1 identities not setting from

[Philip M]

Hi,

Following upgrade (as part of cpanel) to 5.1.1, identities no longer set 
the from address in outgoing emails. Identities only set the reply-to 
address.

How do I configure horde/imp so that a choden identity sets the outgoing 
from address?

many thanks